Locomotive feed water heater of the tank type



July 4, 1933.` Y T, MCBRIDE LOQOMOTIVE FEED WATER HEATER OF THE TANKTYPE Filed Sept. l0, 1930 l ENTOR fail Patented `luly -4, v1933 UNITEDSTATES PATENT yoI-FlcE THOMAS C. MCBRIDE, OF PHILADELPHIA, PENNSYLVANIA,ASSIG-NOB TO WORTHINGTON" PUMP AND MACHINERY,CORPORATION, OF YORK, N.lY., A CORPORATION OF VIRGINIA LoooMoTIvE FEED WATER HEATER or THE TANKTYPE Application. filed September 10, 1930. SerialNa 480,842.

rIhis invention relates to feed Water heaters particularly designed foruse on locomotives, and an object of the invention is to provide a feedwater heater of thetank or tender type in which the exhaust steam fromthe locomotive cylinders or from the auxiliaries of the engine or bothare discharged into a suitable heating tank or compartment in the tenderof the locomotives and in which the reserve supply of hot Water will beprovided. i y

Another object of the present invention is to provide a heater forheating water prior to its entrance into the boiler of the locomotive,which will have a low first cost, may

` comprises a feed water heating system for locomotives including aheated water compartment into which the water to be heated is forced byan injector1 from an overflow compartment. The overflow compartment hascommunication with the water storage compartment of the tender andreceives water therefrom as Well as overiiow or excess water from theheated water compartment. The steam for heating the water is suppliedfrom the exhaust of the engine cylinders and its fiow into the heatedwater compartment is automaticallyv controlled by a valve operatedthermostatically in accordance with the temperature'of the water in theheated water compartment. The heated wateris delivered to the boiler ofthe locomotive by a pump of approved type, the exhaust of whose engineis utilized for operating the injector which delivers the water to theheated water compartment.

`GCI ment thereof, thereby facilitating the heating of the water by theexhaust steam from the locomotive; for the raising of the water level inthe heatingcompartment sufficiently to provide a head on .the suctionofthe pump which delivers the heated water to the boiler of thelocomotive even at times when the water level in the tender storage islow and also includes storage for a quantity of heated water fordelivery to the *boiler at times when the locomotive .is not steaming.

`With these objects in View, the invention consists in various featuresof construction and combination of parts, which will be first describedin connection with the accompanying drawing, showing a feedfwater heaterof the preferred form embodying the invention, and the features. formingthe invention will be specifically Ipointed out in the claims.

In the drawing:

Fig. lis a si e elevation-of a locomotive showing-the improved feedwater heater applied thereto. y

Fig. 2 is a view. partly in side elevation, partly in section of thetender showing the feed water heater. i

Referring more particularly to .the drawing, the locomotive A maybe ofany approved type having steam cylinders B and tender C. The tender Cisprovided with partitions l and 2 therein 'dividing the linterior ofthetender into a heated water compartment', an overflow compartment 4 and awater supply compartment 5. The supply compartment 5vhas communicationwith the overflow compartment 4 near the bottom thereof through asuitable opening 6 which is closed. by a valve 7, the saidA valve beingforced into closed position by the weight of Water in the overflowcompartment 4. Part of the steam from the vcylinders B of the locomotiveexhausts from the cylinders through a suitable connection 8, through theexhaust steam check valve 9, oil separator 10 and pressure reducingvalve 11 through the pipe 12, and hose connection 18 into the heatedwater compartment 3of the tender through the nozzle or pipe 14 of theejector structure 15.

The nozzle or pipe 14 extends upwardly in the compartment 3 above ythenormal water level therein and prevents back flow of water from thecompartment into the injector structure, etc. Also the height of nozzleor pipe 14, Will upon starting of the device after stoppage, induce flowor operation of the inj ector structure, in that the operation in thepipe Will condense'v the steam entering the` pipe to the saturationpoint and continued entrance of steam into the pipe Will force orlift'the Water therein upwardly out of the pipe and induce the liovv ofWater from the compartment 4 into the compartment 3 by the injectoraction.

A thermostatically operated valve 16 is interposed in the line betweenthe cylinders B and the injector 15 and it is controlled by a thermostat17 which is positioned in the compartment 3 and is protected by asuitable mesh housing 18. rlhe injector structure 15 includes acompartment 19 which has communicationwith the overflow compartment 4and receives Water from the overflow compartment Which Water is forcedthrough the nozzle 2O and nozzle 14 into the heated Water compartment 3vby the exhaust steam from the pump 21. The pump 21 vis employedforpumping Water from the heated Water compartment 3 through the hoseconnection 22 anddischarging it into the boiler of the locomotivethrough the usual boiler check rlfhe pump 21 may be of any approved typeof steam operated pump, either displacement or centrifugal and inthedrawing it is shown as receiving its operating steam from the boilerthrough the pipe connection 24. The

' exhaust from the engine end of the pump 21 passes through the pipe 25and the hose connection 26 into the compartment 27 vof the injectorstructure 15. The exhaust steam passes from the .compartment 27 throughthe nozzle 23, and it picks up Water from the compartment 19, forcing itthrough `the nozzle 20 and nozzle 14.

During the passage of the Water through the nozzle 14 it mixes with theexhaust steam from the cylinders B of the locomotive and servestocondense the steam and heat the Water providing heated or hot Water inthe compartment. 3.` Excessv Water from the heated'water compartment3joverflows over the partition 1 into the overflow compartment 3'and isreturned to the heated Water compartment through the injector structure15. A vent 29 is provided'in the partition 2 to permit thev escape ofair and vapor from the compartments 3 and 4 into the tender 5.

lThe compartments 3 and 4 have communicationl near their lower endsthrough an opening 30 which is normally closed by a valve 31, heldclosed by the pressure of Water there against.l Suitable check valves asindicated at 32, 33 and 34 may be provided for preventing back flow. ofWater or steam from the injector structure 1.5.` rlhe exhaust steam fromthe cylinders B besides heating the Water assist in raising it into theheated Water compartment 3.

Summing up, generically the operation of the improved feed Water heateris las fol lows the exhaust steam from the pump 21, passing through theinjector structure 15` lifts or carries 'Water from the overflowcompartment 4 through the nozzle of the injector 15 into the heatedWater'compartment 3 and during its passage through the injector'structure it is mixed With the exhaust steam from the cylinders B of theengine, the pressure of Which is reduced by the pressure reducing valve11, and such mixing serves to condense the steam and heat the Water bythe action of the steam passing through the nozzle 14 which assists inraising'the Water intothe heated Water compartment 3. The tempera-A tureof the Water in the compartment 3 is controlled bythe valve 16 Which isoperated by the thermostat 17 and controls the passage of the exhauststeam from the cylinders B into the compartment3. The heated Water isdrawn olf from the compartment'3 through the connection 22 by the pump21 and delivered to the boiler of the locomotive through the boilercheck 23.

As heated Water is thus Withdrawn from the heated Watercom Jartment 3 b'the um l P P 21, the level of Water in the compartment 3 is not loweredbecause of the action of the injector., but `the level of the Water inthe overflow compartment 4 is lowered. This in turn causes the valve 7'to open and unheated Water flows from the cold Water storage 5 of thetender Cinto the overl-low compartment- 4 and 'is lifted by theinjectorinto the hot Water compartmentf3 to replace Water re movedtherefrom by the pump 21.

yVilhile in the drawing the compartments 3 and 4 are shown as formed bypartitions in the tender C of the locomotive, it is to be understoodthat these con'ipartments may be formed independently of the tender. oras a. separate unit and placed in the tender Withe out departing fromthe spirit of this in-, vention.

At times, particularly in the cold climates, there is a tendency for thecold supply Water" in the tender C to freeze and to overcome thisdisadvantage, a pipe 40 is provided, Which has one end opening into theheated Water storage compartment 3 andthe other end opening into thecold Water storage vpart of the tender. The pipe 40k has a manuallyoperable valve 41 therein, so that when it isy necessary to preventfreezing of the Water in the tender C, the va ve 41 may be opened, whichwill permit Water, ovv-ing to the inclined position of the pipe 40, toflow from the heated Water storage compartment'3 into the cold Waterstorage compartment of the tender.y It will be understood thatY theinvention `is not to be limited tothe specific construction orarrangement ofparts shown butthat these umane may :be modified'widelyfwithinthe Vinvention defined by the claims.

What is claimed is zl. In a feed water heater, a locomotive tenderhaving a heated water compartment, 4

a cold lwater supply compartment, an overflow 'compartment between saidheatedv water compartment and. coldv water supply compartm-ent, aninjector structure forinjecting water and steam Vinto said heatedwatercompartment', .said injector having connection with vthe overliowcompartment-for receivingv `water therefrom, the Walls of said overflowcompartment having valvedl openings therein communicating respectivelywith the heated water compartment and the coldwater supply compartment,said valvesbeing so constructed and arranged wherebywhen `thefwater inthe overow compartment falls below a predetermined.level-cold water willflow from the cold water supply compart-y ment linto 'theoverflow.compartment and when water falls below a predeterminedle'vel inthe heated water compartment water fwill flow from the overflowcompartment direct into the heated water compartment. l

2. In a feed water heater, a locomotive tender havinga heated water"compartment,

a cold water supplycompartment, an overflow compartment between saidheated water compartment and cold watersupply com partment, an injectorstructure for injectving water and steam into said heated watercompartment,l said injector having connection with the overiiowcompartment for receiving water therefrom, the walls of said overiiowcompartment havingl valved open-A ings therein communicating`respectively with the heated water compartment and the cold water supplycompartment, said valves being so constructed and arranged whereby whenthe water in the overfiow compartment falls below a predetermined levelcold wa# ter will flow from the cold water supply compartment into theoveriiow compartment and when -water falls below a predetermined levelin the heated water compartment wa-v ter will flow from the overflowcompartment c direct into the heated water compartment,y

and a thermostatically controlled valve for y controlling `the injectionof steam into said ment, .an'dsaid operating steam nozzlehavingconnection with the steameexha'ust of said pumpwhereby therexhauststeam from the pump Vwill operate the'operating steam inoz- Zle. i 1 i vi '4f Ink a locomotivefeed water heater, in combination, steamcylinders, a water supply source, a heated water compartment, an inljector including a heating :steam nozzle connected to said steamcylinders and delivering i exhaust steam from the cylinders to saidcompartment, a steam operated pump Iconnected to said. compartment forAwithdrawingl ywater therefrom, said .injector structure alsoincludingfa water nozzle and an operating steam nozzle,said water nozzlehaving connection withsaid water supply source for `delivering watertherefrom to said compartment, said operating steam nozzle havingconnection. with the 'steam exhaust 4of said pump whereby `the exhauststeam from the pump will operate the operating steam noz-v zle, andmeans'controlled by r-temperatureof water in the-.heatedfwatercompartment for controlling the yflowfof'heating steam thereinto.V

5; In a locomotive feed waterv heater, in

combination, steam cylinders, a water sup*-y ply source, a heated watercompartmenhan injector including al heating steam nozzle connected tosaid steam cylinders and deliveringexhaust steam from the cylinders tosaid compartment, a steam operated pump connected to said compartmentfor withdrawing water therefrom, said injector structure also vincludinga water nozzle and -an'operatingl steam nozzle, said water nozzle havingconnection with said water supply source for delivering water therefromto said compartment, said operating steam nozzle having con-r nectionwith the steam exhaust of said pump whereby the exhaust steam from thepump will operate the operating steam nozzle, and athermostat in saidheated water compart ment, a valve in the connection between saidcylinders and said injector, said valve connected to saidthermostatwhereby the injection of heating steam into the heated water compartmentwill be controlled by temperature of water therein.

6. In a locomotive feed water heater, in

combination, steam cylinders, ya water supply source, a heated watercompartment, an

-injector, an overflow compartment receiving excess water from saidheated-water compartment, said injector structure including a waternozzle connected to said overflow coinpartment, a valve establishingcommunication between said overflow compartment and said water supplysource, said valve normally maintained closed by pressure of water inthe Yoveriow compartment and operable to.

open when the water level in the overflow compartment falls rbelow apredetermined level to allow water to flowfrom the supply sourceinto theoverilow compartmentfsaid injector structure-including a heating steamnozzle having connection with said steam cylinders for deliveringexhaust steam from said cylinders to said heated Water compartment, andmeans controlled by temperature of water in the heated water compartmentior controlling the flow of heating steam thereto.

7. ln a vlocomotive feed water heater, in combination, steamcylinders, awater supply source,.a heated water compartment, an injector, anoverflow compartment receiving ex-v cess waterfrom said heated `watercompartment, said injector structure includinga. water nozzle connectedto said overflow compartment, a valve establishing coimi'iunicationbetween -said, overflow compartment and said water supply source, saidvalve normallyl maintained closed by pressure of water in the overflowcompartmentand operable to open when the water'level in the overiiowcompart- .ment falls below .a predetermined level to allow water to flowfrom' the supply source into the overflow compartment, said injectorstructure including a heating v'steam nozzle having connection with saidsteam cylinders for delivering exhaust' steam fromsaidcylinders to saidheated Y water compartment, means controlled by temperature of water in4 the heated water compartment for controle ling the flow of heatingsteam thereto, a steam pump connected to Vsaid compartment .forwithdrawing water therefrom, said injector including'v an operatingsteam nozzleconnected to the steam exhaust of said steam pump wherebythe exhaust steam from the steam pump will serve to operate saidoperating steam nozzle. v v

, 8. Ina feed Water heater, a heated Water l compartment, an overowcompartment re ceiving excess water from said heated water compartment,a water supply compartment, agvalve connection between said water-supplycompartment and overflow. compartment said- Valve connection soconstructed yand arranged whereby when the water falls below apredetermined level in the overflow compartment the valve will open topermit waterl i In testimony whereof I aliix my signature. v

THOMAS C. MCBRIDE.Y

